Having issue with my linux web app (Node).

Question

Keep getting application error when i try loading my app. when i performed deep analysis i found out that the container keep throwing this error. requireStack: [ '/home/site/wwwroot/node_modules/.bin/react-scripts' ]

Error: Cannot find module '../scripts/start'
2024-01-16T00:00:50.836917218Z Require stack:
2024-01-16T00:00:50.836920419Z - /home/site/wwwroot/node_modules/.bin/react-scripts
2024-01-16T00:00:50.836923819Z     at Module._resolveFilename (node:internal/modules/cjs/loader:1077:15)
2024-01-16T00:00:50.836927319Z     at Function.resolve (node:internal/modules/cjs/helpers:127:19)
2024-01-16T00:00:50.836931419Z     at Object.<anonymous> (/home/site/wwwroot/node_modules/.bin/react-scripts:31:23)
2024-01-16T00:00:50.836935619Z     at Module._compile (node:internal/modules/cjs/loader:1256:14)
2024-01-16T00:00:50.836940019Z     at Module._extensions..js (node:internal/modules/cjs/loader:1310:10)
2024-01-16T00:00:50.836944019Z     at Module.load (node:internal/modules/cjs/loader:1119:32)
2024-01-16T00:00:50.836947419Z     at Module._load (node:internal/modules/cjs/loader:960:12)
2024-01-16T00:00:50.836950919Z     at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:81:12)
2024-01-16T00:00:50.836955219Z     at node:internal/main/run_main_module:23:47 {
2024-01-16T00:00:50.836958719Z   code: 'MODULE_NOT_FOUND',
2024-01-16T00:00:50.836961919Z   requireStack: [ '/home/site/wwwroot/node_modules/.bin/react-scripts' ]
2024-01-16T00:00:50.836965619Z }

Answer 1

Hello @neutrolabs limited we are sorry to hear you're having this issue. can you please share how you deployed your Linux web app?

The error message you’re seeing, “Error: Cannot find module ‘…/scripts/start’”, typically occurs when Node.js can’t find the module it’s trying to require. In this case, it seems like it’s unable to find the start script in your react-scripts package. Is the start script in your package.json file correctly pointing to the start script in package?

Sometimes, this issue can be resolved by deleting your node_modules folder and your package-lock.json file, and then running npm install to reinstall your packages. Also, if you’re deploying your app to Azure, make sure that your startup command is correctly set in your App Service configuration

For example, you might need to set the startup command to pm2 start <.js-file-or-PM2-file> --no-daemon---

---

I hope this helps! Let me know if you have any other questions.

-Grace

Answer 2

Here is a workflow file that resolved my issue. don't forget to set "SCM_DO_BUILD_DURING_DEPLOYMENT = true" in web app environment variables on Azure:

on:
  push:
    branches:
      - main
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4

      - name: Set up Node.js version
        uses: actions/setup-node@v3
        with:
          node-version: '20.x'

      - name: Install dependencies
        run: npm install

      - name: Build the React app
        run: npm run build

      - name: Zip the build directory for deployment
        run: zip -r release.zip ./*

      - name: Upload build artifact
        uses: actions/upload-artifact@v3
        with:
          name: react-app
          path: release.zip

  deploy:
    runs-on: ubuntu-latest
    needs: build
    environment:
      name: 'Production'
      url: ${{ steps.deploy-to-webapp.outputs.webapp-url }}
    permissions:
      id-token: write

    steps:
      - name: Download build artifact
        uses: actions/download-artifact@v3
        with:
          name: react-app

      - name: Login to Azure
        uses: azure/login@v1
        with:
          client-id: ${{ secrets.AZUREAPPSERVICE_}}
          tenant-id: ${{ secrets.AZUREAPPSERVICE }}
          subscription-id: ${{ secrets.AZUREAPPSERVICE }}

      - name: Deploy to Azure Web App
        id: deploy-to-webapp
        uses: azure/webapps-deploy@v2
        with:
          app-name: 'web-app-name'
          slot-name: 'Production'
          package: release.zip